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Compact superconducting cyclotron quench protection circuit based on series connection form

A technology for cyclotron and quench protection, which is applied to emergency protection circuit devices, usage of superconductor elements, electrical components, etc., can solve the problems of quench protection system not working, increased power loss, and simultaneous voltage changes, etc., to achieve simple and effective Quench protection function, lower energy consumption, and accurate detection effect

Pending Publication Date: 2019-03-22
CHINA INSTITUTE OF ATOMIC ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But when the superconducting coil is working normally, the energy unloading resistor will also lose part of the energy, which increases the power loss
[0006] At the same time, for the detection of the quench protection voltage signal, in the existing schemes, the voltage difference between the two superconducting coils of the accelerator is mostly used to determine whether the quench is detected. When this mode is actually used, due to the superconducting coil Due to the uncertainty of the quench, the voltage of the two superconducting coils will change at the same time during the quench. Simple detection of the voltage difference between the two superconducting coils will easily lead to the situation that the quench protection system does not work during the quench.

Method used

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  • Compact superconducting cyclotron quench protection circuit based on series connection form
  • Compact superconducting cyclotron quench protection circuit based on series connection form
  • Compact superconducting cyclotron quench protection circuit based on series connection form

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Embodiment 1

[0038] Such as figure 1 As shown, a compact superconducting cyclotron quench protection circuit based on series connection includes a power supply 2, two superconducting coils 5, and a quench protection module 6. The power supply 2 and the two superconducting coils 5 are connected in series to form a main circuit. In the loop, the quench protection module 6 is connected to the two superconducting coils 5, respectively detects the voltage of the two superconducting coils 5 and makes a judgment.

[0039] A discharge resistor R is connected in series with the main circuit 1 , dump resistor R 1 A transfer switch K is connected in parallel at both ends 1 ; The power supply 2 is connected in series with a quench protection switch K 2 , power supply 2 and quench protection switch K 2 with a freewheeling diode D 1 in parallel; the transfer switch K 1 and quench protection switch K 2 Controlled by the quench protection module 6.

[0040] Under normal conditions, the quench prot...

Embodiment 2

[0047] Such as figure 2 As shown, the difference between this embodiment and Embodiment 1 is that a protection circuit is connected in parallel at both ends of the superconducting coil 5 . When the superconducting coil 5 loses time, the protection circuit can shunt the current on the superconducting coil 5 to slow down the sharply rising heat when the superconducting coil 5 loses time, so as to achieve the purpose of protecting the superconducting coil 5 .

[0048] In this embodiment, the protection circuit is a clamping diode D connected in parallel at both ends of the superconducting coil 5 2 , the clamping diode D 2 It consists of two sets of power diodes connected back to back that can work at the temperature of liquid helium.

[0049] During normal operation, the clamping diode D 2 No current flows, when the superconducting coil 5 quenches, the clamping diode D 2 It works to limit the voltage rise of the superconducting coil 5 from being too high. clamping diode D ...

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Abstract

The invention relates to a compact superconducting cyclotron quench protection circuit based on a series connection form. The circuit comprises a main loop consisting of a power supply and two superconducting coils, and further comprises a quench protection module connected with the two superconducting coils; the quench protection module detects the voltages of the two superconducting coils and makes a judgment; an energy unloading resistor and a quench protection switch are connected to the main loop in series; a change-over switch is connected to the two ends of the energy unloading resistorin parallel; a fly-wheel diode is connected to the two ends of the power supply in parallel; the change-over switch and the quench protection switch are controlled by the quench protection module. The quench protection circuit based on the series connection form can meet the quench protection requirement of the superconducting coils of the compact superconducting cyclotron, the quench protectionfunction of the superconducting coils can be simply and effectively realized, the energy consumption is reduced, and meanwhile, the detection is more accurate.

Description

technical field [0001] The invention relates to the field of cyclotrons, more specifically, it relates to a series-based compact superconducting cyclotron quench protection circuit. Background technique [0002] A cyclotron is an instrument that uses the combined action of a magnetic field and an electric field to act on charged particles. The magnetic field causes the charged particles to perform cyclotron motion. During the cyclotron motion, the charged particles are repeatedly accelerated by a high-frequency electric field to form a high-speed particle beam. Cyclotrons are widely used in the fields of nuclear medicine, aerospace military industry and basic research of nuclear physics. Superconducting technology is now widely used in various fields such as electric power, medicine, national defense and military industry, and it plays a huge role in national economy and national construction. [0003] Cyclotron superconducting coils are able to maintain a superconducting s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/00
CPCH02H7/001Y02E40/60
Inventor 蒋昊王川李要乾李明崔涛
Owner CHINA INSTITUTE OF ATOMIC ENERGY